John beading



(No Model.)

J.` READING. WALL PAPER TRIMMER.

N0.497,5z8@ A Patentedmay 16,1893.v

f NITED STATES.

PATENT OFFICE.

JOHN READING, OF AKRON, OHIO, ASSIGNOR TO DALLAS H. READING AND HERBERTREADING, OF SAME PLACE.

WALL-PAPER TRIMMER.

SPECIFICATION' forming part of Letters Patent No. 497,528, dated May 16,1893.

Application tiled November 17, 1892. Serial No. 452,351. (No model.)

To all whom it may concern:

Be it known that l, JOHN READING, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented a certain new and useful Improvement in Wall-Paper Trimmers, ofwhich the following is a specification.

My invention has relation to improvements in that class of wall-papertrimmers, in which two metallic disks mounted on short shafts, orarbors, journaled in substantially parallel bearings, have their faces,for al short distance of their peripheries, laterally contiguous,arranged to simultaneously revolve in opposite directions, andconstitute shearing edges.

Heretofore it has been customary to enforce the contact between thedisks by means of springs; and to cause a simultaneous movement of thedisks by means of gear wheels; resulting in constant wear of the disks,and noise in the operation of the machine.

The object of my invention is to dispense with gear wheels and springs,and the attendent objectionable features just noted; and to produce anefticient machine, which shall be practically noiseless in operation,andin which the contact of the disks shall be automatically graduated,in proportion to the resistance offered by the paper to be trimmed; andits further object is to reduce the friction of the paper in passing theshearing disks, and to render the driving mechanism readily adjustableto compensate for stretching of the driving belt; and generally tosimplify the construction and reduce the number of parts.

To the aforesaid objects, my invention consists in the peculiar andnovelv construction, arrangement and combination of parts hereinafterdescribed, and then specifically pointed out in the claims, referencebeing had to the accompanying drawings, forming a part of thisspecification.

In the accompanying drawings, in which similar reference lettersindicate like parts in the diiferent figures Figure l, is a perspectiveview of one end of my improved wall-paper trimmer, showing the operativeparts; and Fig. 2, a plan (in outline) of the same.

Referring to these drawings, A is abase, preferably of wood, on which ismounted a head block B, usually of cast metal, embodying journalbearings O, D, E, for the arbors of the upper and lower cutting disks,and the winding rod, respectively; and having a reinforced slot F,(shown in dotted lines in Fig. 1,) for the axle of the driving wheel.The

bearing D, is bored in a true line with the maf chine; and the bearingC, at a slight angle therewith, its outer end being turned to the right.

In the bearings O, D, are journaled arbors that bear on theirinner endsthe beveled-edge disks G, H, respectively, and on their outer ends theband sprocket wheels I, J; the length of said arbors being such as topermit of slight longitudinal movement in their bearings, the disksbeing arranged to extend past each other vertically forja short distanceat their point of nearest approach, and, by reason of dierencein thelines of their axles, as hereinbefore stated, to press their adjacentfaces against each other at the left, or toward the front of themachine, as shown in Fig. 2, and at the point of entrance of the paper.In the bearing E, is a short shaft bearing at its outer end a sprocketwheel K, and on its inner end a longitudinally toothed head L, toreceive the toothed end of the detachable winding rod M. Mounted in theslot F, and held by an inner nut, is'an axle bolt N, on which isjournaled the large driving sprocket wheel O, provided with a handle P.A round endless belt Q, passes around the wheel O, and from the top,under the wheel I, and, from below, around the wheel K, to and beneaththe wheel J; the part between the wheels K, andj, passing outside theother part at the point of crossing. By thus arranging and crossing thebelt, the

disks are simultaneously driven in opposite ,e

lineV of intersection of `the disks, is a free roller S, to permit thepaper to travel freely, and preventfrietion as it passes the shearingdisks. I do not, however, by this description intend to confine myinvention to sprocket wheels, as grooved pulleys may be substitutedtherefor With like general eect, the sprocket Wheels being preferred asaffording surer traction for the belt, the pulleys and sprocket wheelsbe ing regarded as equivalents as herein used.

I claim as my inventionl. In a wall-paper trimmer of the classdesignated, the disk-carrying arbors, with their respective Wheels anddisks, said disks being arranged to press laterally against each other,and the driving wheel, and the winding rod Wheel, combined with anendless belt passed about said drivingr and winding rod Wheels, andpartially about the Wheels of the diskcarrying arbors, and crossedbetween the latter wheels and one of the other wheels, the

divergence of the portions of said belt about each disk-carrying arborWheel by reason of such crossing being opposite the direction in untoset my hand.

JOHN READING.

In presence of- C. P. HUMPHREY, Geo. M. WRIGHT.

